It's likely you've had a breakthrough moment in your life.
This may have occurred in your running, while you were learning a new skill, or at work.
Whatever the breakthrough was in, you likely did something or changed something before the big development to help trigger the gain. Looking back can be a helpful learning experience for yourself and others who are making strides to improve a similar endeavor.
Recently at the forums on LetsRun.com, a discussion started on the topic of asking forum ...